The Nastiest Feud in Science
A Princeton geologist has endured decades of ridicule for arguing
that the fifth extinction was caused not by an asteroid but by a
series of colossal volcanic eruptions. But sheʼs reopened that debate.
Bianca Bosker, The Atlantic, September 2018
https://www.theatlantic.com/magazine/archive/2018/09/dinosaur-extinction-debate/565769/
Gerta Keller, Professor of Geosciences
http://gkeller.princeton.edu/
Yours,
Paul H.

Dinosaurs ended - and originated - with a bang ?
In the new paper, published today in Nature Communications, evidence is provided to match the two events – the mass extinction, called the Carnian Pluvial Episode, and the initial diversification of dinosaurs
Press release
http://www.bristol.ac.uk/news/2018/april/dinosaurs-ended-and-originated-with-a-bang-.html
Paper
https://www.nature.com/articles/s41467-018-03996-1

End-Permian mass extinction was not so massive
By Belinda Smith, Cosmos Magazine
https://cosmosmagazine.com/palaeontology/mass-extinctions-were-not-so-massive-study
"US paleontologists states once the dust settled
following the 'great dying' around 250 million
years ago, nearly 20% of species remained – not
4%. Belinda Smith reports."
Paleontologist suggests 'great dying' 252 million
years ago wasn't as bad as thought, October 4, 2016
http://phys.org/news/2016-10-paleontologist-great-dying-million-years.html
The paper is:
Stanley, S. M., 2016, Estimates of the magnitudes
of major marine mass extinctions in earth history.
Proceedings of the National Academy of Sciences,
US, vol. 113 no. 42 E6325-E6334
http://www.pnas.org/content/113/42/E6325
Yours,
Paul H.